Its pretty easy to do... The force could be between 250 and 350nm, it depends on how much you want to lift the hood before it lifts by it self... And the Ø, i don't think it matters much, as long as it's not that large... And for the size of it, between 44 and 48cm i guess...
What i did was go to a garage and ask them for the used gas strut that they had, and then i tried them out and found the best one...
Our Indian friends have the tutorial:
http://www.team-bhp.com/forum/technical ... -polo.html ![Very Happy :D](./images/smilies/icon_biggrin.gif)